Abdullah al-Aftah

Abdullah al-Aftah (720-766), also known as Abdullah ibn Jafar, was the Fathiyya imam of Shia Islam from 765 to 766, succeeding Jafar al-Sadiq. He died without issue, ending the Fathiyya line.

Biography
Abdullah al-Aftah was born in 720 to Jafar al-Sadiq, and was of the Banu Fatim clan of the Quraysh tribe. Many of Jafar's followers accepted Abdullah as his successor as the imam of Shia Islam upon his death in 765, and they became known as Fathiyya, the largest and most important section of Jafar's followers. About 70 days after the death of his father, Abdullah himself died, and the bulk of his supporters supported his brother Musa al-Kadhim after he died. Fathiyya believed him to be the 7th imam and Musa the 8th, but Twelver Shia believe that Abdullah was skipped and that Musa was the seventh imam (which he was, in effect).